Razor



Jan.v 28, 1941.

J. M. ROTH 2,230,123

4 RAZOR Filed April 2l, 1938 @ma M. 6 @mi ma@ i M M475 Patented Jan. 28, 1941 PATENT OFFICE RAZOR,

Jacob M. Roth, Los Angeles, Calif., assigner to Claudia L. Roth, Los Angeles, Calif.

Application April 21, 1938, Serial No. 203,286

1 Claim.

This invention relates to razors, and consists in an attachment to or an addition to the structure of a razor that adapts the razor more perfectly to its use. I have applied the invention to successful use as an attachment to a safety razor, and in such application I shall describe and specifically claim it. y

In the accompanying drawing Fig. I is a view in side elevation, and Fig. II a view partly in end elevation and partly in transverse section (on the plane indicated by the line II-II, Fig. I) of a safety razor in whose structure my invention is embodied. Fig. III is a view in plan of the blade of the razor here illustrated.

The razor of the particular form here shown includes in its structure a handle l that carries integrally a guard 2; a cap 3 that is hinged to the guard at one side; and a blade 4. The handle is tubular. The guard (integral with the handle, as already noted) is perforated by an orifice concentric with though of less diameter than the bore of the handle, and is additionally provided on its blade-receiving surface with outstanding, longitudinally extending, blade-positioning ridges 30; the blade is centrally oriced, and additionally provided with slots for the passage of the ridges 30 of the guard; and the cap carries integrally a screw-threaded centre post 5, and is grooved longitudinally to receive the ridges 30. When the razor is assembled and closed (with the blade in position, between guard and cap) the centre post 5 extends through blade and guard and within the tubular handle, as shown in full lines in Fig. II; and, when the razor is open (for the introduction of and the removal of blades), the cap with its centre post stands remote from the guard, as indicated in dotted lines, Fig. II. The cap on its outer surface is rounded substantially to cylindrical shape. Within the tubular handle is arranged a stem 6. This stem, though freely rotatable Within the handle, is conveniently so secured as to have a limited though sufficient range of longitudinal displacement. It is tubular throughout a suf- :licient portion of its extent and is interiorly screw-threaded, so that it forms a nut that, when the razor is closed, may engage the centre post of the cap, and by advance upon the post may clamp the blade upon the guard. In order to effect such clamping, the stem 6 abuts upon the guard from beneath. The securing of the stem to the handle with such limited range of longitudinal displacement but freedom for relative rotation may conveniently be effected by means of a locking-ring 1, borne by one and extending into a recess formed in the other of the two members I and 6. The stem 6 is provided with a head 8 that, as a feature of compact and rugged structure, overlies the stem and extends externally throughout a portion only of 5 the length of the stem. Adjacent external surfaces of handle and stem are knurled, rto afford more 'secure nger-hold in adjusting the parts.

The guard 2 at its ends is formed with lateral extensions 20, and, in the paired extensions on 1o the two sides, rollers 9 are mounted for idle turning. The radius of curvature of the rollers 9 is conveniently less than that of the outer face of the cap 3; and the proportions are such that in the assembly the rollers are spaced at slight 15 intervals from the side edges. of the cap. Such interval sulices for the extension through of the edges of the blade 4. IThe edges 0f the blade extend slightly beyond the planes tangent both to the rollers severally and to the cylindrical out- 20 er face of cap 3. The space between roller and blade widens rearwardly (with respect to the direction of advance) for the free escape of the refuse of shaving. It is a feature of manifest simplicity and value, to make the axis of turn- 25 ing of the hinged cap coincident with the axis of one of the rollers 9.

In service, under the slight pressure of normal use, the advancing roller smooths irregularities and gives precision and rmness to the position 30 of the beard-bearing surface at the point where 'the blade advances to its attack on the hair; it

causes the facial tissue of the user to arch wave. like before the advancing blade, with the hair at its base in best position for the blade to meet 35 it. The roller smooths, attens, and controls the flow of the skin relatively to the edge of the razor blade, and keeps the skin properly positioned relatively to the edge of the blade. The eifects are greater precision in shaving, and more o complete assurance against accidental cutting of the skin. Considerably more pressure may be exerted and a closer shave effected, without danger of cutting.

I claim as my invention:

A safety razor including a tubular handle, a centrally perforate guard borne integrally by the handle, a cap equipped with an integrally borne threaded center post hinged to the guard and movable between an open position, in which the guard is exposed for free application of and removal of a blade, and a closed position, in which the cap may rest upon a centrally oniced blade in position on the guard, its center post extending through the orificed blade and through 55 the provision for limiting the range of relative longitudinal movement between rotatable stem and handle consisting in a locking ring borne by one of the last named members, and extending into a recess formed in the other of said mem- 6 bers.

JACOB M. ROTH. 

